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    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <h1>我是two页面</h1>
    <a href="./three.html">跳转到three页面</a>
    <button onclick="window.history.back()">点击回退到one</button>
</body>
</html>